Gratatouille is a framework for building Gradle plugins using a functional programming approach. It processes Kotlin functions annotated with @GTask, @GPlugin, and @GExtension via KSP to generate complete Gradle plugin implementations including task classes, workers, entry points, and descriptor files. The framework enforces classloader isolation to prevent dependency conflicts and provides automatic build caching, parallel execution, and automatic task wiring. Generated code follows Gradle best practices with proper input/output annotations and up-to-date checks.